linux-kernel - [PATCH 1/2] soc_mediabus: export a useful method to obtain the number of samples that makes up a pixel format

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Date:	Wed, 12 Jan 2011 12:16:19 +0100
From:	Alberto Panizzo <maramaopercheseimorto@...il.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	HansVerkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] soc_mediabus: export a useful method to obtain the
 number of samples that makes up a pixel format


Signed-off-by: Alberto Panizzo <maramaopercheseimorto@...il.com>
---
 drivers/media/video/soc_mediabus.c |   14 ++++++++++++++
 include/media/soc_mediabus.h       |    1 +
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/soc_mediabus.c b/drivers/media/video/soc_mediabus.c
index 9139121..5bba424 100644
--- a/drivers/media/video/soc_mediabus.c
+++ b/drivers/media/video/soc_mediabus.c
@@ -132,6 +132,20 @@ static const struct soc_mbus_pixelfmt mbus_fmt[] = {
 	},
 };
 
+s32 soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf)
+{
+	switch (mf->packing) {
+	case SOC_MBUS_PACKING_NONE:
+	case SOC_MBUS_PACKING_EXTEND16:
+		return 1;
+	case SOC_MBUS_PACKING_2X8_PADHI:
+	case SOC_MBUS_PACKING_2X8_PADLO:
+		return 2;
+	}
+	return -EINVAL;
+}
+EXPORT_SYMBOL(soc_mbus_samples_per_pixel);
+
 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf)
 {
 	switch (mf->packing) {
diff --git a/include/media/soc_mediabus.h b/include/media/soc_mediabus.h
index 037cd7b..f21cbd0 100644
--- a/include/media/soc_mediabus.h
+++ b/include/media/soc_mediabus.h
@@ -61,5 +61,6 @@ struct soc_mbus_pixelfmt {
 const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
 	enum v4l2_mbus_pixelcode code);
 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf);
+s32 soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf);
 
 #endif
-- 
1.7.1



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